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St. Patrick's Day 2011

A woman wears giant sunglasses as she celebrates with thousands along 5th Avenue in New York during the city's 250th annual St. Patrick's Day parade on March 17. Mike Segar/Reuters

A man dressed as a leprechaun has his picture taken with a woman during the annual St. Patrick's Day parade on March 17, in Savannah, Ga. Stephen Morton/AP

Sleeping during the annual St. Patrick's Day parade, Tristan Robertson is pulled along the parade route by his father on March 17, in Savannah, Ga. Stephen Morton/AP

A member of the National Fallen Firefighters Foundation Pipes and Drums march past the historic dome of Savannah City Hall during the annual St. Patrick's Day parade on March 17, in Savannah, Ga. Stephen Morton/AP

A man and a boy watch the the St. Patrick's Day celebrations in Belfast, Northern Ireland on March 17. Peter Morrison/AP

Dressed in his favorite stick-on shamrock, family pet 'Harry Potter' waits for the start of the annual St. Patrick's Day parade on March 17, in Savannah, Ga. Stephen Morton/AP

From left, US House Speaker John Boehner (R) of Ohio, President Barack Obama, Irish Prime Minister Enda Kenny, and Representative Peter King (R) of New York walk together as they depart after the annual Friends of Ireland St. Patrick's Day luncheon at the US Capitol in Washington on March 17. Jonathan Ernst/Reuters

New York City Mayor Michael Bloomberg (l.) marches up Fifth Avenue with Police Commissioner Raymond Kelly (c.) during the St. Patrick's Day parade on March 17, in New York. AP

Visitors from Fribourg, Switzerland, watch as participants march up Fifth Avenue during New York's annual St. Patrick's Day parade on March 17. AP

A piper leads the annual city St. Patrick's Day parade down King Street in Charleston, SC, on March 17. It is one of two parades in Charleston celebrating the holiday. Bruce Smith/AP

Members of the New York firefighters march in annual St. Patrick's Day parade on March 17, in Savannah, Ga. Stephen Morton/AP

A young girl with her face painted watches the annual St. Patrick's Day parade in Belfast, Northern Ireland on March 17. Cathal McNaughton/Reuters

The Chicago River is dyed green on March 12, ahead of the St. Patrick's Day parade in Chicago. Paul Beaty/AP